@book{bhlpg49923391, title = {Bollettino malacologico }, volume = {v.19-21 (1983-1985) [Incomplete]}, url = {https://www.biodiversitylibrary.org/page/49923391}, publisher = {Unione malacologica italiana}, author = {Società italiana di malacologia. }, year = {1983}, pages = {Page 183}, } @book{bhlpg11045521, title = {Manual of conchology, structural and systematic : with illustrations of the species }, volume = {Ser.1,v.15}, url = {https://www.biodiversitylibrary.org/page/11045521}, publisher = {Published by the Author, Academy of Natural Sciences}, author = {Tryon, George W., (George Washington), 1838 -1888}, year = {1893}, pages = {Page 419}, } @book{bhlpg24138724, title = {Manual of conchology, structural and systematic : with illustrations of the species }, volume = {Ser.1, v.15}, url = {https://www.biodiversitylibrary.org/page/24138724}, publisher = {Published by the Author, Academy of Natural Sciences}, author = {Tryon, George W., (George Washington), 1838 -1888}, year = {1879}, pages = {Page 419}, } @book{bhlpg19168926, title = {Manual of conchology, structural and systematic : with illustrations of the species }, volume = {Ser.1, v.15}, url = {https://www.biodiversitylibrary.org/page/19168926}, publisher = {Published by the Author, Academy of Natural Sciences}, author = {Tryon, George W., (George Washington), 1838 -1888}, year = {1879}, }